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非均质厚油层进入高含水期后,开发上的主要问题是扩大注入水的水淹体积和提高水淹区的驱油效率。本文对注悬浮液扩大水淹体积的方法从理论和实践上进行了探讨。文章用室内模型实验和矿场试验的资料,论述了注悬浮液具有调整油层非均质性,选择性堵塞油层高渗透部位大孔道扩大水淹体积的作用。用室内实验资料论述了悬浮液在孔隙介质中的渗流特性,提出了在孔道中既能流动又能形成堵塞的悬浮物粒径与孔径的关系,从机理上进一步论证了注悬浮液具有选择性堵塞大孔道的功能;还论述了悬浮液的浓度、注入压力、悬浮液的性质对渗流特征的影响;并对如何降低悬浮物的用量,改进工艺措施,改善注悬浮液的技术经济效果等问题进行了讨论。
After the heterogeneous thick oil layer enters the high water cut period, the main problems in development are to expand the flooded volume of injected water and improve the flooding efficiency in flooded areas. In this paper, the method of expanding the flooding volume of the suspension is discussed theoretically and practically. In this paper, the data of indoor model experiment and field test are used to discuss the effect of injection suspension on the heterogeneity of oil layers and the selective plugging of large channels in the high permeable part of the reservoir to enlarge the flooding volume. The relationship between the particle size and the pore size of suspended solids in the porous media was discussed. The relationship between the particle size and the pore size of the suspended particles in the porous media was discussed. The mechanism of the suspension suspension was also proved to be selective The function of plugging the macropore and the influence of the concentration of the suspension, the injection pressure and the nature of the suspension on the characteristics of the seepage are also discussed; and how to reduce the dosage of the suspended matter, improve the technical measures and improve the technical and economic effects of the suspension in suspension Discussed.